Inhibition of T cell-mediated cytolysis by 2-deoxy-D-glucose (2-DG): differential effect of 2-DG on effector cells isolated early or late after alloantigenic stimulation in vitro

Details

Inhibition of T cell-mediated cytolysis by 2-deoxy-D-glucose (2-DG): differential effect of 2-DG on effector cells isolated early or late after alloantigenic stimulation in vitro

Journal

Journal of Immunology

Author(s)

MacDonald H. R., Cerottini J. C.

ISSN

0022-1767 (Print)

Publication state

Published

Issued date

03/1979

Volume

122

Number

3

Pages

1067-72

Notes

Journal Article --- Old month value: Mar

Abstract

The effect of the hexose analogue 2-deoxy-D-glucose (2-DG) on the functional activity of various populations of cytolytic T lymphocytes (CTL) has been compared. Under aerobic conditions, CTL harvested at the peak of the response (day 4) in primary or secondary mixed leukocyte cultures (MLC) were much more readily inhibited by 2-DG that CTL obtained from MLC at later times (day 11 to 18) or from the peritoneal cavity of alloimmune mice. Quantitatively, 0.4 mM 2-DG was sufficpient to inhibit cytolysis by 50% in day 4 CTL populatons, whereas 25 mM had little or no effect on day 11 to 18 CTL. Evidence was obtained that inhibition of cytolysis by 2-DG under these conditions was accompanied by a parallel inhibition of effector:target cell binding. In contradistinction to these findings, the cytolytic activity of both day 4 and day 11 MLC cells was readily inhibited by 2-DG under conditions where cell respiration was blocked by sodium azide. Furthermore, uptake of radiolabeled 2-DG was observed under aerobic conditions in both day 4 and day 11 MLC cells. These results strongly suggest that inhibition of cytolysis by 2-DG under aerobic conditions is mediated via a direct effect on CTL which is independent of the consequences of energy depletion. An indirect method by which CTL may be inhibited by 2-DG is suggested.